Pneumatic feeding device for stoping-drills.



3. G: LEYNER.

EMT? FREE NG DEVIC E FOR STOPENG DRILLS.

AKELUIATRGW TILED ()CT. 23

Patented June 17, 1913.

2 SHEBTS SHBET 1.

J. LEYNER PNEUMATIC FEEDING DEVICE FOR STOPING DRILLS.

AYPLIOATIOR FILED 0W1. 23, 1911.

Patented June 1?, 1913.

2 BKSETE -SHEEE 2.

following is a specification. to

- stoping drills,

JOHN GEORGE LEYNER.

OF DENVER, COLORADO.

PNEUMATIC FEEDING DEVICE FOR STOPING-DRILLS.

Specification of Letters Patent.

Patented June 17, 191 3.

Application filed October 23, 1911. Serial No. 656,267.

To all whom it may concern Be It known that I, Jonx Groncn Larsen,

a citizen of the United States of America,

residing in the city and county of Denver and State of Colorado, have invented a new and useful Pneumatic Feeding Device for Rock-Drilling Stoping-Drills, of which the y invention relates to improvements in pneumatic feeding device for rock drilling and the objects of my invention are: I

-FirstTo provide a pneumatic feeding device for stoping drills, in which a single manually operated valve rotatahly mounted in the stoping drill and is' provided with a handle that is adapted to he moved recip rocally through the age of a circle durin the operative movement -of the valve, and that is arranged in such cooperative relation to a series of air inlet and exhaust. ports formed in the stoping drill that. when said handle and valve are moved a part of their operative movement, the valve-will admit the actuating fluid" to the drill bit feed- 11w iston first, and 'when moved the rest of b 1ts operative movement, will admit the actuating fluid to the drill bits driving piston afterward, and is so arranged that when the actuating fluid is first turned into the drill bit feeding part of the .stoping drill, it re- 1 mains turned therein until and during all of the time the actuating fluid is turned into the drill driving part of the stoping drill, and-is also so arranged that when the ac tuating fluid is to be shut oil' from the stoping drill, the handle and valve-are first movedbackward and the actuating fluid is first turned off from the drill bit-driving part of the stoping drill, and then from the till .bit feedingpart of the stoping drill phere.

Second-To provide .anai-r-feeding device having a cup shaped pisthe feeding tube is pressure between its cupped end and the adqacent rearcylinderhead of the drillin engines cylinder, and in which the piston lead an'd its abutment engaging piston rod is .o nd its surrounding?- tube feeds rward, andwhen moved to its initial" .position of disuse,. op'ens :thedrill hit feed partof tlIG'StOPI'Dg drill to the atmos- I l l cooperatively connect.

side of the said valve,

tional view portionofthee 'linder,the valve being in the illustrated in the accompanying drawings,

in whichr Figure 1 is a vertical, longitudinal, scct-ional view of the improved stoping drill, Fig. 2 is a plan view of the air feed tube showing the back head and drill rotating handle carried thereby, at the forward end of the same, and the piston rod guide cap on its rear end, Fig. 3 is an end view of the back head, Fig. 4 is a vertical, transverse sectional view of the same, Fig. 5 is an end view of the piston rod guide cap, Fig. 6 is an end view of the rear cylinder head, Fig. 7 is a vertical sectional view of the same, Fig. 8 is an end view of the piston head, Fig. 9 is a side vie iv of the same, Fig. 10 is a plan view of a portion of the air feeding device and of the members that it to'the cylinder portiono'f-the rock-drilling engine, Fig. 11 is a horizontal sectional'view of the hammer pistonoylinder'casing on the axial plane of the throttle valve, the said valve being shown in full lines,F-ig. 12 is' a horizontal, sectional view throughthe valve chest of the cylinder casin the valve and end plugs being omitted, lg. 13 is a vertical, transverse, sectional view thereof on Fig. 12, Fig. 14 is a side tle valve,'Figl 15 is 'a view of the opposite Fig. 16 is a vertical, longitudinal,- sectional view through the portedpoitinn'of-the said valve, Fig: 17 is a transverse, sectional view thereof, Fig.']8 is a sectionalview-similar to Fig. 11, but on a slightly reduced scale and showing a portion only of the-cylinder, the throttle valve beingflin a osition reverse to that shown in Fig, 11, kg. 19 is a transverse, s'ectlirough the throttle valve, and a same position: own in Fig-. 18, or saas to cut on the pressure supply from thecy-iinder drill bit and the cylinder the line 13-13 of view of the thrct.

, a view similar to and feed tube and exhaust the air from the said tube, the three positions of the valve being indicated by dotted lines, and Fig. 20 is Fig. 19, showing the valve in such a position as to admit air to the feed-tube, before its admission to the main cylinder.

Similar letters of reference refer to similar parts throughout the several views.

Referring to the drawings, the numeral 1 designates the cylinder portion of the cas ing of my improved stoping drill, in which a hammer piston 2 is reciprocally mounted.

3 designates the front cylinder head, which is provided With a hub prti0n 4, that fits snugly but. loosely into the cyl1ndrical bore 5 of the cylindrical casing 1. The front cylinder head is provided with a striking pin 6 which is mounted to move'reciprocallya short distance. One end projects into the axial bore of the cylinder 1 and into the reciprocal path of the hammer piston 2 far enough to be driven forward by the hammer piston on its reciprocal strokes against the end of the drill bit 7, and is adapted to have a short forward'and rearward feeding movement of about a half of an inch to compensate vfor the automatic feeding movement of the stoping drill. The reciprocal movement of the drill bit striking end of the striking pin is defined by the adjacent end of a drill bit supporting sleeve 9, which I term the drill bit holding chuck, which is provided with. a hub portion 10 that fits into the larger bore of the firont cylinder head. This drill bit supporting chuck is provided w th an axial aperture that is adapted to support the shank end of the rock crushing drill bit 7.

The front head 3 is provided with 0 positely extending air vent apertures 13, w ich are preferably positioned at the to and bottom sides of the same, and are a apted to permit any air that may leak from the cylinderpast the striking pin into the in the head, from cushioning the striking pin, thus preventing its striking the drill bit with the full fOICc of the blow of the hammer piston.

The hammer piston is a cylindrical piston, with flat ends and preferably without piston rings.- Its reciprocal movement is delined by the triking pin supporting front cylinder head. and a rear cylinder head 14:, which fits against the rear end ofthe cylinder, and is provided with a hub portion 15 that projects into it a short distance. This rear cylinder head is also provided with a rearwardly projecting hub extension 15, which is formed into two reduced step portions 16 and 17, as shown in F igs. 1 and 7. The step portion 16 is arranged to receive the forward end of an air feed tube LS Wh-ich fits snugly but loosely over it, and the step 17 is oft smaller diameter and is provided aperture 7 with a collar end portion 19. The step 17 is adapted to receive and retain between its collar 19 and its adjacent step portion 16, an air feed retaining ring 20, w ich is a split expansive steel ring that is sprung over the collar portion 19 and fits within an axial recess 21, formed in the front end of the piston head 22 of the air feed tube 18. This piston head 22 is a plug shaped circular piston head which is provided with a threaded axial aperture 23', in which a reduced threaded end portion on the inner end of a piston rod 24 is screwed. A washer 25-of metal or other rigid'material is placed on the reduced threaded end of the piston rod against the shoulder 26 formed ed portion and the body of the piston rod, and the adjacent end of the piston head is providedwith a reduced step portion 28, around which a, resiliently expanding steel ring 28 -is placed, and over this spring ring 28 the circumferential band ortion of a cup shaped washer 29 of leat er or other suitable material is placed. The body portion of this cupped washer is mounted on the reduced end 30 of the piston head between the metal washer and .the' adjacent shoulder of the piston head. The expanding ring 28 acts to press the leather washer against the circular wall of the piston bore of the air feed tube. The front end portion of the air feed tubeextends into and is secured to a sleeve 31, preferably expanded therein, which sleeve I back head of the stoping drill. This back head bears against the rear cylinder head, and on its opposite side projecting lu portions 33 are formed, and the front cy inder head, the drill bit supporting chuck and the cylinder casing are a so provided on their opposite side portions with In portions 34, which are also arranged in a inement with the lugs of the back head. The lugs of these parts are all provided with apertures 35, which are adapted to receive bolt rods These bolt rods 36 extend loosely through the apertures III the lugs and are provided with beads 27 that fit against the outside of the lugs of the chuck. The opposite ends of these bolt. rods extend through and beyond the lugs on the back cylinder head and through the apertured ends of a washer plate 39, which is mounted loosely on the feed tube 18, and .coil springs 40' are interposed between the plate 39 and, the back head 31. The ends of the rods are threaded to receive 'nuts 41. The coiled springs are adapted to be com )rcssed by screwing the nuts 41 against tie washer plate, and the tension under which the springs are thereby held causes them to exert an oulivard pull on therods audalso a pressure upon the hack head which clamps the cylinder, its head portions and the chuck together in alineluept and with a resilient between the threadby being term the gaging faces with transversely arranged ribs or keys 42, which are adapted to be engaged by grooves 43 in the adjacent faceof the washer plate, into which grooves the keys slip as the nuts are turned on the rod againstthe plate, the nuts being finally stopped with their lreys resting in the groove of the plate when the springs are compressed to the required tension to clamp the "cylinder and its heads and the ehucktogether.

The back head 31- is provided with al projecting hub portion 44, through one side of which a slot 45 is formed along the opposite.

'tially threaded oris otherwise removably it is necessary that the drill bit be turnedor moved or partial'lyrotated in alternate di' rections While drilling rock, as will be described "more fully hereinafter. The air feed tube extends rearwa'rdly from the back head and may be made ,of-any predetermined length that will enable the stoping drill to be easily and quickly handled. I preferably make-this air feed tube about thirty inches long and its outer end isthreaded and is adaptedto receivea cap' 49 through which the piston rod extends; This cap comprises a cylindrical portion, which fits over the end ofthe air feed tube and a hub portion through which the piston rod 24 passes. The interior of the cylindrical portion is threaded adjacent to the hub end thereof to receive the threaded end; of the air feed tube. This cylindrical portion is slotted andapertured lugs 50 are formed on opposite wallsof the slot, which receive aclamping bolt 51 by :which the cap may be clamped upon 1 with la hexagonal wrench receiving portion a's'shown iii-,Eigl 2. This pistonrod 24 I terin an abutment engsging pisizon rod, as

osition 'it is adapted to he held stationary against any part of the side walls or of the door or root of the oe portions of mines, or againstany s1 able stationary block or other object that is made to act an abut ment for it, will he more fully explained hereinafter.

A small air vent aperture 52 is formed Lhroughthc shell of the air feed tube, which is adapted to allow the air in the tuhe J hind the piston to escape as the piston moves forward, and this aperture also permits the actuating air to exhaust when the piston reaches the limit of its outward movemerit.

The piston rod extends from the piston head of the on feed tube through and beyond the end of the air feed tube a short distance, and its terminal end lr; tapered to a point, as shown.

The drill bit driving hammer piston 2 in the cylinder 1 is operated by a valve that is inclosed in a valve chest 56, which forms a part of and is preferably cast integral with it. This valve chest has a cylindrical bore 57, formed through it, which forms a valve seat for a stem and collar form of valve 58, which fits snugly but reciprocally in the said bore. Theopposite end portions of this bore are threaded and plugs are threaded to them. provided with head portions that screw up against the ends of the valve chest, and these head portions are provided with surfaces adapted to receive a wrench for inserting the plugs into and, for renmring them from the valve chest. The valve comprises a stem portion having: collar portions 61 and 62 at its opposite ends, and two collar portions 63 and 64; intermediate oi. its ends at predetermined equal distances from its ends and from the center of its length, said collars being arranged to cover two cylinder inlet ports 65 and 6 3 and control two exhaust ports (57 and 68. .The cylinder inlet ports 35 and 66 extend from the valve seatto the opposite ends of the'hammer piston cylinder, while the exhaust ports andjtES extend from the valve seatinto an ehhaust outletaperture 69 formed in and along the top of the valve chest that opens to the atmosphere at the rear end of the valve chest; The air inlet ports are placed 'ateach side of theport '72, which is formed in a lmb '73 0mm one side of the cylinder casing. The em The outside ends of the plugs are trance to this air inlet hub-73 "is threaded and a bushing 74 is threaded in it, which is provided with an inwardly flaring tapering aperture in which the taper' ig end portion of an elbow '75 fits, the outer end of which is threaded to receive a hose coupling nipple 76. ihe valve seat 71 is provided with a throttle valve '77, which may consist of any suitable form of air controlling valve, but I preferably, however, use a valve having a tapered tubular portion which is seated in the tapered or conical seat 71, and which is provided with a port 78, which is adapted to register with the entrance port 7 0 in the cylindrical valve seat 57, a ground joint being formed between this tapering tubular valve and its tapering seat. The stem of the valve extends through a hub on the opposite side of the casing, and a handle 79 is secured to its projecting end, preferably by being bolted thereto by a bolt 80.

A small air port 81 is drilled horizontally into the valve chest from the outside, and has its outer end closed by a plug. This port communicates with the tapered valve seat 71, so as to be controlled by the tubu lar throttle valve, and it is intersected by a substantially vertically drilled port 82, the entrance of which also closed by a plug, and this port 82 also intersects the inner end of a. horizontal port 83, that is drilled into the end portion of the valve chest. This port 823 communicates with an annular groove 84, that. is formed in the inner face of the rear cylinder head, which groove forms a distributing port from which extend a plurality of obliquely arranged ports 85, which communicate with an axial chamber So in the rearwardly extending hub portion of the rear cylinder head, from which chamber the air acts directly on the piston head of the piston rod 24 of the air feed tube 18, and pushes the feed tube and the drilling cylinder forward on the piston head until the drill bit bears against the rock in operative position to drill a hole, when the air under constantpressure against the piston head holds the entire stoping drill suspended between the point of its abutment piston rod and the point of the drill bit, in operative rock-drilling position.

The port 78 in the throttle valve communicates with an axial port 78- in the body of the valve, and the port 78' communicates with the inlet port 72. A port 78 is} formed in the periphery of the throttle va'lve and extends from one side of the porti 78 substantially a fourth. of the way ardtmd the periphery of the valve. This port adapted to communicate with the port- 81 when the valve is turned in the position shown in Figs. 1 and 11, so that air may pass from the port 78 to the port 78 and thence through cylinder ports 81, 82 and '83 and ports 84 and 85 in the rear cylinder head to the cylinder-head chamber 86, whence it acts directly against the adjacent cud of the piston head 22. A slight groove or port 78 is cut in the edge of the port 78 opposite the port 78. The object of this port 78 is to admit air through the ports 81, 82, 83, 84 and 85 to the interior of the air feedtuhe 18 when the valve is turned to cause the ort 78 to register with the port 81,

whic position is assumed by the valve whenthe handle is turned in a vertical position, in order that it may act on the feed piston 22, and the admittance of air from the valve through the port 81 into the feed tube starts the feed tube forward on the piston head and feeds the drill bit against the rock.-

This is done before air is admitted to the hammer piston, and consequently before the hammer piston starts to reciprocate against the drill bit, as will be described more full hereinafter,

The va ve is provided with. an exhaust port groove 78 which is open to the atmosphere at one end and which is arranged to permit the air to exhaust from the feed tube 18 back through the ports 85, 84, 83, 82 and 81 and this groove 78 to the atmosphere whenever it is desired to stop the rock. drilling operation, which is done by moving the valve in the reverse direction from that in which it is turned to admit air, which movement first shuts off the air to the cylinder (see Fig. 20), and afterward shuts off the air to the feed tube, and then when the valve is further turned until its.

handle comes 'to its normal stop position see Fig. 19), the port 78 registers with t e port 81, and the exhaust from the tube to the atmosphere is open and the drill is then inoperative.

Ports 58 and 58 respectively, are drilled in from opposite ends of the valve chest casing and parallel with the bore of said casing, as shown in Fig. 12, and their outer ends are plugged. These ports are intersected by horizontal ports 58 and 58 respectively, which are drilled through from the outside of the chest into its bore, these holes entering the chest a slight distance back of the inner ends of plugs 59, which inner ends are reduced in diameter, as shown in Fig. 1, to permit the entrance of air to the chest.

The inner ends of the ports 58 and 58 are intersected by vertical ports 58 and 58 respectively, which enter the hammer the ports (35, ($7 and 69. The hammer piston isnow thrown to the rear and when its forward end uncovers the port .38 air is admitted to the chest in front of the valve through the ports 58, 5S and 58 and the valve is thrown to the rear end of the chest. thereby opening port (35 and permitting the air in front of the hammer piston to exhaust through orts till. ('8 and (it).

The end colliirs il and U2 of the slide vahe are provided with small exhaust ports tit and 62-, respectively. It will he noted that the distance between the port 58 and the forward end of the cylinder is less than the distance between the port 58 and the rear end of the cylinder; this is in order that when the hammer piston has moved only a short distance on its rear stroke the said port 58" will be opened and the slide valvethrown to admit air to the rear of the hammer piston in time to cushion the piston on its rear stroke and thus prevent it from striking the rear cylinder head 14.

An oil reservoir 87 is formed upon the bottom of the cylinder, the opposite ends of which are threaded to receive threaded plugs 88. Oil passages '89 and 90 are drilled in from opposite ends of the oil reservoir through the cylinder shell, and permit the oil to work from. the oil reservoir into the cylinder. This feature of my stoping drill is fully explained in Letters Patent. No. 958,260, issued to me May 17, 1910.

The oil works from the reservoir to the cylinder as the hammer piston reciprocates on the cylinder and wipes the oil up and distributes it throughout the cylinder, from which it works into the valve chest through its ports to the slide valve 58.

The operation of my improved air feeding device for stoping drills is as follows: The elbow 75 is connected to a hose, which I do notillustrate, but which extends to a supply of compressed air of from about 60 to pounds pressure, which is admitted by the operator to the throttle valve which is rotated in its seat by its handle which 15 preferably arranged to engage astop lug 79 that is cast on the cylinder. The handle stands in a horizontal position against this lug, as shown in Fig. 18, and is adapted to be'moved upward and swing in a semi-circular path, and when all of the ports are open and the drill is being operated the handle is arranged to rest in a substantially horizontal position on the opposite side of the lug 79. as shown in Figs. 10 and 11,

and this throttlevalve admits air to the feed tube first, when moved to open the air inlet ports and into the drill cylinder last, but the ports are so arranged that the valve keeps the air inlet ports to the feed tube constantly and continuously open from the time they are first opened until and during the time the ports to the drill cylinder ire open and until they are closed by a reverse lnovementof the valve and the hammer piston stops running.

The operation and the detailed movement of the valve is as follows: The attendantplaces the point of the abutment engaging piston rod against the floor or one of the side walls of the mine stops in which the drill is being used, or-againsts' ainy suitable placed the abutment point 0 the piston rod against an abutment in the site e of the nnne, raises the handle from its orrzontal position to a vertical position which turns the valve from its open feed tube exhaust position and closes the exhaust port from the feed tube to the atmosphere and o ens the port 7 8 to the port 81 first, and a1 ows the air to flow into the ileedttube against the piston head and move the. feedtube on the piston head forward, and the operator guides the drill bit against the rock at the point where he desires to drill a hole, as the drill bit and the cylinder are moved for-1 ward with the tube by the air pressure on the piston head. The stoping drill isthen operatively set and supported between its abutmentpoint and the point of the drill bit, and the hammer iston should then be started. This is done by moving the handle from its vertical position down to a substantially horizontal position on theoppositie side of the stop In from which it. started. This movement; 0 the handle turns the valve to open its main port-78' to the air port; 7 O of the cylinder from which air flows to the oppositeend of thecylinder and re- 'cipro'cates the hammer piston, which strikes the drill bit, and drills a hole in the rock while the operator oscillates the drill bit, cylinder and feed tube by swinging the handle 48 in short reciprocal strokes. The air inlet port 78 however, still remains open from the time it. is first opened when the handle is raised to a vertical position during its movement to open the port 70 to admit air to the cylinder. As this port; 78 extends a. quarter around the valve, it keeps the port 81 open to the feed tube and conseq-uentl air is admitted to the feed tube constant y and continuously from t e time the valve opens the feed tube port 8 until and durin all the time the cylinder port is open.' nsequently the operative move ment of the handle and valve first closes the feed tube exhaust; second, opens the air ports to the feed tube before air is admitted to the hammer piston cylinder; and third, then opens the air port to the hammer piston cylinder while continuously holding the air port to the feed port open, and thus 1:0

keepingthe piston of the feed tube under constant pressure against its abutment and the drill bit against the rock. Upon wishing to stop the hammer piston and the drilling engine, the handle and the valve are reversed and the air is first shut off from the drill cylinder and then afterward from the feed tube, and then afterward theexhaust port is opened from the feed tube to the atmosphere. The complete operative cycle movement of the valve having then been made, the sloping drill is moved to a new position and the operation is repeated.

My invention provides a simple, thoroughly practical and highly efficient air feeding device for sloping drills, that is economical in the use of air, and one that is light and can be easily and quickly handled by a single operator when attached to an operative rock drilling cylinder such as is illustrated in my pending application, Serial No. 587,651, filed October 13, 1910.

Having described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a feeding device for sloping drills, the combination of the cylinder, its front .cylinder head and drill holding cap and its rear sleeve and cylinder had portions and the air feed tube connected to said sleeve portion, said sleeve and air, eed tube and cylinder and front cylinder ahead and cap portions being arranged in axial alincment and fitted to bear end to end together and provided, on their opposite sides with later ally projecting lugs provided with bolt receiving apertures, recesses in the cap arranged and adapted to receive the heads of bolts and prevent. them from turning, a spanner washer mounted loosely on said air feed tube and provided with bolt rm'civing apertures in alincment with the bolt receiving aperitures of said cylinder and sleeve, bolts extendin through all of said lugs and having their leads littin; in the said bolt lead receiving recesses of said cap, expanding coiled springs mounted on said bolts between said spanner washer and the lugs of said sleeve, keyways across the outside surface of said spanner washer and arranged in a diametrical path across its bolt receiving apertures, and nuts thread d on the ends of said bolts and arrange-"l to screw against the outer surface of d spanner washer and having their washer engaging ends provided with projecting keys arranged and adapted to fit. into the .kcv'ways in the lugs of. said sleeve whereby the lt "ilicnt or pansive tension of said springs locks said nuts to said spanner, washer against accidental displacement and clannuingly binds said sleeve and airfecd tube and cylinder and cylinder head and cap "together with 1:. resiliently yielding pressure.

In a feeding device for st iping drills,

the combination of the cylinder and front and rear heads. the front cap, the air feed tubes supporting sleeve, the air feed tube and the spanner washer mounted slidably on said air feed tube with the bolts extending loosely through said cylinder and its heads, the front cap and the sleeve and the spanner washer, said spanner washer being provided with keyways extending across its rear surfaces in diamctric alincment with the center of the bolts extending through it, nuts on the ends of said bolts provided with key portions adapted to fit into the keyways of said spanner washer and the expansive coiled springs mounted on said bolts be tween said spanner washer and said sleeve, whereby said cylinder parts are locked to gether with a resiliently clamping yielding pressure of any predetermined tension to sta'nd the operation of drilling holes in rock.

A stoping drill, comprising an engine cylinder having a rear head, a feed piston, a tubular casing: for the feed piston, and means connecting said cylinder and said casing for resiliently holding said casing against the rear cylinder head.

4. A striping-drill comprising an engine having, a rear cylinder head, a sleeve adjacent said rear cylinder head, a feedpiston, and a. tubular casing for the fcedqiiston secured within the sleeve, and means for yicldingly clamping said tubular casing and said sleeve to said engine.

5. A stripingtril front and rear cviindcr heads on said ongine, a sleeve adjacent said rear cylinder head, a feeding mechanism comprising a feed-piston, a tubular crsine: for said feed piston secured within said sleeve. and means for yieldingrly clamping the feeding nnwrhw nism through said sleeve to the rear cylinder head.

(I. A. stopingdrill compr sing an engine having a rear cylinder head provided with a shoulder, a feeding niecl'mnism comprising a feed-piston, a tubular casing for the feedpiston fitting over said shoulder, a sleeve on said casing near the shoulder. a Washerplate on said tubular casing, and means between said sleeve and said washer plate for yieldingly clamping the feeding mechanism to said engine.

T. A stopingdrill comprising an cnsrine having a rear cylinder head provided with a shoulder, :r feed-piston. a tubular casing for the feed-piston fitting over said shoulder, a washer-plate on said tubular casing, drillrocking means secured around the tron t. end of said casing, and means comprising siderods engaging the engine having roiled springs inlrrposrd between said washer plate and said r cking means for yicldingly clamping the fer-din; me hanism to said enginc.

A stoping'alrill comprising an engine having :1 fl'wlil cylinder head and a Your 1! 5 up: mmwl flung-1 m all! flw-wum] sun indm' hmn'l pl'nvidcd with shoulder. :1 You-- \\.n-hv1-p!n fur ie-Mingiy Plumping Hm piston, an outer slum u adjacent said rear [w'l lng' mmmnm in Hue rwn' cylinder uylirnler lmul having :lperumwl flilhfifh. a Fund. v

5 tubular (:zwing fur the fmrd-pMnn titling In 1 -.--,linn)n In-mm" I afiix my signature 15 over said shunldvl' and secured within said I]! n- ,vnv z mi twn \vitnus-u. sicevc, (h'ill-rmzkinnmms (-onnw'lml will] JOHN (IIIUIU HJ LEYNER.

said sleeve a washer wlntu 0n mid tubular; \ViHMhwUNI naming, and nwuns ('umpnming ,Mv-rmlshuv lhmnn'r J. \VALTMAN, 20 mg culled sprmw mlvl'ymsml hvlwwn 111 i llumnn'ru i. MCKOQI. 

